Centrifugal pump.



,0. HAENTJENS.

CENTRIFUGAL PUMP,

APPLICATION FILED ocr. 29. m15.

then specifically pointed out inthe 30 the i The ca-'sing is OTTO HAENTJENS, 0F NEWARK, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO WORTHINGTON PUMP AND MACHINERY CORPORATION, 0F NEW YORK, N. Y., A

CORIORATION OF VIRGINIA.

incassa .cnivrnrruenn rui/rr.

Patented Apr. 23, with..

Application filed October 29, 1915. Serial lilo. 58,700.

To all whom t may concern:

Be it knownthat I, O'rfro HAENTJENs, a subject of the Emperor of Germany, residing at Newark, county of Essex, and State of New Jersey, havey invented certain new-and l5 eiliciency and in which the fluid shall make no sharp turns and the velocity ot the water shall be gradually reduced and transformed to pressure between the iirst and second stages.

In'the accompanying drawings forming a part of this specification, there 1s shown for the purpose of` illustration a two-stage cenl.Tf-,trifugal Pump 0f the Preferred form embodying au the features of the invention, and thS. pum

will now be described in deeatures forming the invention claims; A

tail and the In the drawings Figure 1 is a vertical central section of pump.' Flg. 2 is a plan view of the lower half of the casing with the impellers and their shat removed; an

Fig. 8 is a sectional elevation on linel 3--3 eroi-rig. i.

B eferring to the drawings, A, A are respectivelythe first and second stage impellers carried by shaft B, these impellers eingbflreversed so as to balance the pump.

shown as divided on a horizontal plane into a lowensection C and an upper section D, each carrying a portion of the partition E separating the impeller chambers, these sections being bolted toi gether to form the casing and the lower section C carryingthe suction and discharge passages F, G, with the anged connection ends. The shaft B is mounted between the two sections C and D, with bearing in the @andthe casingwalls. elivery from the first stage develops into a discharge passage 2 leading tangentially downward and gradually enlarging in cross section, and continued by a cross passage 3 under the discharge volute 4 of the second stage and then curving upward to the eye of the second impeller. The volutes 1 and 4 are set about 50 degrees apart, which has been found to produce the smoothest and g most eilicient flow and to best provide for that() suction and discharge connections from the lower section of the'casing. y 'y It will be seen that this invention proyides a very compactl and efficient pump through which there is a smooth and even ow,'and with the split casing shown, having its suction and discharge passages and the passage connecting the two stages formed in the lower section, results in a very light Weight upper casting which is important for easy removal.

What I claim is.

1. A centrifugal pump having two single suction im ellers arranged back to back with their sing e suctions in opposite directions and with volute deliveries and a assage connectingthe discharge volute of t e firststage with the suction ot the second sta e, said discharge assage running tangentiailly from the first ischarge volute in gradually increasing crosssection to gradually reducethe velocity of the iiuid and transform it into pressure and then transversely under the volute delivery ofthe second stage, and v upward to the eye of the second impeller.

2. A centrifugal pump having two single suction vimpellers' arranged bacltY to back with their single suctions in opposite-directionsand with volute deliveries, a assage connecting the discharge volute` oi. t e first stage with the suction of the second ysta e, said discharge passage running tangentialy downwardfr'om the 1Erst discharge volute in adually increasing cross-section to grad-i ually reduce the velocity of the Huid and transformn it into pressure and then transversely under the volute delivery of the secondl stage and upward to the eye of the second mpeller, and a casing formed in two suction and discharge 4 connecting the discharge. volute of the rst stage with'the suetionot the second stage,

said discharge passage running tangentially downward from the first discharge volute n gradually increasing cross section to gradually reduce the velocity of the fluid and transform it into pressure and then transversely under the volute delivery of the second stage and upward to the eye of the second mpeller, anda casing formed in two sections eut on a horizontal plane, the lower section carrying the suction and discharge passages, the volutes being arranged for the flow of the liquid in the same direction and with the terminals of both volutes in the' lower section and the terminal of the first sta-ge volute about 50O of the second stage volute.

In testimony whereof, I have hereunto set my hand, in the presence of two subscrbing witnesses.

OTTO HAEN TJ EN S.

behind the terminal 15 

